import util from '@/libs/util'
import router from '@/router'
import { cloneDeep } from 'lodash'

/**
 * @description 检查路径是否存在 不存在的话初始化
 * @param {Object} param dbName {String} 数据库名称
 * @param {Object} param path {String} 路径
 * @param {Object} param user {Boolean} 区分用户
 * @param {Object} param validator {Function} 数据校验钩子 返回 true 表示验证通过
 * @param {Object} param defaultValue {*} 初始化默认值
 * @returns {String} 可以直接使用的路径
 */
function pathInit({
    dbName = 'database',
    path = '',
    user = true,
    validator = () => true,
    defaultValue = ''
}) {
    const uuid = util.cookies.get('uuid') || 'ghost-uuid'
    const currentPath = `${dbName}.${user ? `user.${uuid}` : 'public'}${path ? `.${path}` : ''}`
    const value = util.db.get(currentPath).value()
    if (!(value !== undefined && validator(value))) {
        util.db.set(currentPath, defaultValue).write()
    }
    return currentPath
}

export default {
    namespaced: true,
    actions: {
        /**
         * @description 将数据存储到指定位置 | 路径不存在会自动初始化
         * @description 效果类似于取值 dbName.path = value
         * @param {Object} param dbName {String} 数据库名称
         * @param {Object} param path {String} 存储路径
         * @param {Object} param value {*} 需要存储的值
         * @param {Object} param user {Boolean} 是否区分用户
         */
        set(context, { dbName = 'database', path = '', value = '', user = false }) {
            util.db
                .set(
                    pathInit({
                        dbName,
                        path,
                        user
                    }),
                    value
                )
                .write()
        },
        /**
         * @description 获取数据
         * @description 效果类似于取值 dbName.path || defaultValue
         * @param {Object} param dbName {String} 数据库名称
         * @param {Object} param path {String} 存储路径
         * @param {Object} param defaultValue {*} 取值失败的默认值
         * @param {Object} param user {Boolean} 是否区分用户
         */
        get(context, { dbName = 'database', path = '', defaultValue = '', user = false }) {
            return new Promise(resolve => {
                resolve(
                    cloneDeep(
                        util.db
                            .get(
                                pathInit({
                                    dbName,
                                    path,
                                    user,
                                    defaultValue
                                })
                            )
                            .value()
                    )
                )
            })
        },
        /**
         * @description 获取存储数据库对象
         * @param {Object} context context
         * @param {Object} param user {Boolean} 是否区分用户
         */
        database(context, { user = false } = {}) {
            return new Promise(resolve => {
                resolve(
                    util.db.get(
                        pathInit({
                            dbName: 'database',
                            path: '',
                            user,
                            defaultValue: {}
                        })
                    )
                )
            })
        },
        /**
         * @description 清空存储数据库对象
         * @param {Object} context context
         * @param {Object} param user {Boolean} 是否区分用户
         */
        databaseClear(context, { user = false } = {}) {
            return new Promise(resolve => {
                resolve(
                    util.db.get(
                        pathInit({
                            dbName: 'database',
                            path: '',
                            user,
                            validator: () => false,
                            defaultValue: {}
                        })
                    )
                )
            })
        },
        /**
         * @description 获取存储数据库对象 [ 区分页面 ]
         * @param {Object} context context
         * @param {Object} param basis {String} 页面区分依据 [ name | path | fullPath ]
         * @param {Object} param user {Boolean} 是否区分用户
         */
        databasePage(context, { basis = 'fullPath', user = false } = {}) {
            return new Promise(resolve => {
                resolve(
                    util.db.get(
                        pathInit({
                            dbName: 'database',
                            path: `$page.${router.app.$route[basis]}`,
                            user,
                            defaultValue: {}
                        })
                    )
                )
            })
        },
        /**
         * @description 清空存储数据库对象 [ 区分页面 ]
         * @param {Object} context context
         * @param {Object} param basis {String} 页面区分依据 [ name | path | fullPath ]
         * @param {Object} param user {Boolean} 是否区分用户
         */
        databasePageClear(context, { basis = 'fullPath', user = false } = {}) {
            return new Promise(resolve => {
                resolve(
                    util.db.get(
                        pathInit({
                            dbName: 'database',
                            path: `$page.${router.app.$route[basis]}`,
                            user,
                            validator: () => false,
                            defaultValue: {}
                        })
                    )
                )
            })
        },
        /**
         * @description 快速将页面当前的数据 ( $data ) 持久化
         * @param {Object} context context
         * @param {Object} param instance {Object} vue 实例
         * @param {Object} param basis {String} 页面区分依据 [ name | path | fullPath ]
         * @param {Object} param user {Boolean} 是否区分用户
         */
        pageSet(context, { instance, basis = 'fullPath', user = false }) {
            return new Promise(resolve => {
                resolve(
                    util.db.get(
                        pathInit({
                            dbName: 'database',
                            path: `$page.${router.app.$route[basis]}.$data`,
                            user,
                            validator: () => false,
                            defaultValue: cloneDeep(instance.$data)
                        })
                    )
                )
            })
        },
        /**
         * @description 快速获取页面快速持久化的数据
         * @param {Object} context context
         * @param {Object} param instance {Object} vue 实例
         * @param {Object} param basis {String} 页面区分依据 [ name | path | fullPath ]
         * @param {Object} param user {Boolean} 是否区分用户
         */
        pageGet(context, { instance, basis = 'fullPath', user = false }) {
            return new Promise(resolve => {
                resolve(
                    cloneDeep(
                        util.db
                            .get(
                                pathInit({
                                    dbName: 'database',
                                    path: `$page.${router.app.$route[basis]}.$data`,
                                    user,
                                    defaultValue: cloneDeep(instance.$data)
                                })
                            )
                            .value()
                    )
                )
            })
        },
        /**
         * @description 清空页面快照
         * @param {Object} context context
         * @param {Object} param basis {String} 页面区分依据 [ name | path | fullPath ]
         * @param {Object} param user {Boolean} 是否区分用户
         */
        pageClear(context, { basis = 'fullPath', user = false }) {
            return new Promise(resolve => {
                resolve(
                    util.db.get(
                        pathInit({
                            dbName: 'database',
                            path: `$page.${router.app.$route[basis]}.$data`,
                            user,
                            validator: () => false,
                            defaultValue: {}
                        })
                    )
                )
            })
        }
    }
}
